<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>引入bootstrap</title>
    <link rel="stylesheet" href="../bootstrap/css/bootstrap.css">
</head>
<body>
    <h1>你好，世界</h1>

<script src="../jquery/jquery-3.3.1.js"></script>
<script src="../bootstrap/js/bootstrap.js"></script>
</body>
</html>